JP2008193073A - Printed circuit board and method of designing printed circuit board - Google Patents

Printed circuit board and method of designing printed circuit board Download PDF

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Publication number
JP2008193073A
JP2008193073A JP2008011805A JP2008011805A JP2008193073A JP 2008193073 A JP2008193073 A JP 2008193073A JP 2008011805 A JP2008011805 A JP 2008011805A JP 2008011805 A JP2008011805 A JP 2008011805A JP 2008193073 A JP2008193073 A JP 2008193073A
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Prior art keywords
line
fiber
circuit board
printed circuit
angle
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Inventor
Yukyoku Rin
有旭 林
Chan-Fei Tai
▲セン▼輝 戴
Seitatsu Go
政達 呉
Chih-Hang Chao
志航 趙
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Hon Hai Precision Industry Co Ltd
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Hon Hai Precision Industry Co Ltd
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    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K1/00—Printed circuits
    • H05K1/02—Details
    • H05K1/0213—Electrical arrangements not otherwise provided for
    • H05K1/0237—High frequency adaptations
    • H05K1/0248—Skew reduction or using delay lines
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K1/00—Printed circuits
    • H05K1/02—Details
    • H05K1/0213—Electrical arrangements not otherwise provided for
    • H05K1/0237—High frequency adaptations
    • H05K1/025—Impedance arrangements, e.g. impedance matching, reduction of parasitic impedance
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K1/00—Printed circuits
    • H05K1/02—Details
    • H05K1/03—Use of materials for the substrate
    • H05K1/0313—Organic insulating material
    • H05K1/0353—Organic insulating material consisting of two or more materials, e.g. two or more polymers, polymer + filler, + reinforcement
    • H05K1/0366—Organic insulating material consisting of two or more materials, e.g. two or more polymers, polymer + filler, + reinforcement reinforced, e.g. by fibres, fabrics
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K2201/00—Indexing scheme relating to printed circuits covered by H05K1/00
    • H05K2201/02—Fillers; Particles; Fibers; Reinforcement materials
    • H05K2201/0275—Fibers and reinforcement materials
    • H05K2201/029—Woven fibrous reinforcement or textile
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K2201/00—Indexing scheme relating to printed circuits covered by H05K1/00
    • H05K2201/09—Shape and layout
    • H05K2201/09209—Shape and layout details of conductors
    • H05K2201/09218—Conductive traces
    • H05K2201/09227—Layout details of a plurality of traces, e.g. escape layout for Ball Grid Array [BGA] mounting
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K2201/00—Indexing scheme relating to printed circuits covered by H05K1/00
    • H05K2201/09—Shape and layout
    • H05K2201/09209—Shape and layout details of conductors
    • H05K2201/09218—Conductive traces
    • H05K2201/09281—Layout details of a single conductor

Abstract

<P>PROBLEM TO BE SOLVED: To provide a printed circuit board and a method of designing the printed circuit board. <P>SOLUTION: The printed circuit board includes an insulating layer. On the surface of the insulating layer, at least signal lines parallel to each another are wired, and in the insulating layer, an insulating cloth is arranged and the insulating cloth is composed of first fiber lines parallel to each other and second fiber lines perpendicular to the first fiber lines. In the insulating cloth, a rectangular area is formed by a center line of two neighboring first fiber lines and a center line of two neighboring second fiber lines. The orthographic projection of the signal line onto the insulating cloth is not parallel to the first fiber line, the second fiber line, or the diagonal line of the rectangular area. Consequently, part of the signal line passes through the first fiber line and the second fiber line and the other part passes through the rectangular area, and therefore, it is possible to prevent the resistance of the signal line from varying considerably and improve the quality of signal transmission. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

本発明は、印刷回路基板及び該印刷回路基板の設計方法に関し、特に信号を伝送する品質が良い印刷回路基板及び該印刷回路基板の設計方法に関するものである。   The present invention relates to a printed circuit board and a method for designing the printed circuit board, and more particularly to a printed circuit board having a good quality for transmitting signals and a method for designing the printed circuit board.

印刷回路基板（Ｐｒｉｎｔｅｄ Ｃｉｒｃｕｉｔ Ｂｏａｒｄ，ＰＣＢ）は、一般的に絶縁層と銅箔パターン層からなる。該絶縁層は、通常絶縁布（例えば、ガラス繊維布である）を熱固性樹脂に浸漬した後、固化させて製造したものである。   A printed circuit board (PCB) generally includes an insulating layer and a copper foil pattern layer. The insulating layer is usually produced by dipping an insulating cloth (for example, a glass fiber cloth) in a thermosetting resin and then solidifying it.

図１と図２を参照すると、印刷回路基板の絶縁層１の表面には、信号線１７が配線される。該絶縁層１の中には、絶縁布１０が配置される。該絶縁布１０は、横列に並ぶ繊維線１１と縦列に並ぶ繊維線１２が平織り方法によって織られるものである。該絶縁布１０には、前記横列に並ぶ繊維線１１と縦列に並ぶ繊維線１２によって規則に並ぶ複数の隙間１３が形成される。樹脂は、該隙間１３に填充されている。繊維線１１、繊維線１２及び樹脂は、異なる誘電率を持つ。例えば、普通の繊維線の誘電率が約６．６であり、樹脂の誘電率が約３．２である。   Referring to FIGS. 1 and 2, signal lines 17 are wired on the surface of the insulating layer 1 of the printed circuit board. An insulating cloth 10 is disposed in the insulating layer 1. The insulating fabric 10 is made by weaving a row of fiber wires 11 and a row of fiber wires 12 by a plain weaving method. In the insulating cloth 10, a plurality of gaps 13 are regularly arranged by the fiber wires 11 arranged in rows and the fiber wires 12 arranged in columns. Resin is filled in the gap 13. The fiber wire 11, the fiber wire 12, and the resin have different dielectric constants. For example, the ordinary fiber wire has a dielectric constant of about 6.6, and the resin has a dielectric constant of about 3.2.

印刷回路基板に配線される前記信号線１７は、各種の方向に配線されている。通常、信号線１７を水平方向Ｘと０°、４５°、９０°、−４５°などの角度を成すように配線する。従って、前記絶縁布１０への前記信号線１７の正投影が前記繊維線１１または前記繊維線１２と重なる可能性がある。例えば、図１に示した水平方向Ｘと０°、９０°の角度を成す信号線１７である。前記絶縁布１０への前記信号線１７の正投影が前記隙間１３に填充された樹脂を通る可能性がある。例えば、図１に示した水平方向Ｘと４５°、−４５°の角度を成す信号線１７である。前記繊維線１１、前記繊維線１２及び樹脂が異なる誘電率を持つから、上記のような配線された複数の信号線１７の抵抗が不同一になる。従って、異なる信号線１７の信号が不同一に遅延され、信号を伝送する品質に影響を与える可能性がある。さらに、信号線を曲がり配線する時、該信号線のある部分の抵抗が大きくなり、他の部分の抵抗が小さくなるので、信号を伝送する品質に悪影響を与える。   The signal lines 17 wired to the printed circuit board are wired in various directions. Usually, the signal line 17 is wired so as to form an angle such as 0 °, 45 °, 90 °, and −45 ° with the horizontal direction X. Therefore, there is a possibility that the orthographic projection of the signal line 17 onto the insulating cloth 10 overlaps the fiber line 11 or the fiber line 12. For example, the signal line 17 forms an angle of 0 ° and 90 ° with the horizontal direction X shown in FIG. There is a possibility that the orthographic projection of the signal line 17 onto the insulating cloth 10 passes through the resin filled in the gap 13. For example, the signal line 17 forms an angle of 45 ° and −45 ° with the horizontal direction X shown in FIG. Since the fiber line 11, the fiber line 12, and the resin have different dielectric constants, the resistances of the signal lines 17 wired as described above are not the same. Therefore, the signals on the different signal lines 17 are delayed inconsistently, which may affect the quality of signal transmission. Further, when a signal line is bent and wired, the resistance of a certain part of the signal line is increased and the resistance of the other part is decreased, which adversely affects the quality of signal transmission.

図３を参照すると、図１の部分IIIの拡大図である。前記絶縁布１０に横列に並び、且つ隣接する２つの繊維線１１の中心線と、縦列に並び、且つ隣接する２つの繊維線１２の中心線によって、方形区域１５（図３に示した点線に囲まれた区域）が形成される。前記絶縁布１０に横列に並び、且つ隣接する２つの繊維線１１の中心線の間の距離Ｌ１が４５．３６×１０−３センチメートルである。即ち、１７．８６×１０−３インチである。前記絶縁布１０に縦列に並び、且つ隣接する２つの繊維線１２の中心線の距離Ｗ１が４５．３６×１０−３センチメートルである。即ち、１７．８６×１０−３インチである。すると、横列に並ぶ前記繊維線１１の中心線と方形区域１５の対角線が成す角度φ１がａｒｃ ｔａｎＬ１／Ｗ１＝４５°であり、縦列に並ぶ前記繊維線１２の中心線と方形区域１５の対角線が成す角度θ１が９０°−φ１＝４５°である。信号線を前記方形区域１５の対角線に沿って配線すれば、この信号線に通過された樹脂が多いので、誘電率が最小になる。従って、前記方形区域１５の対角線に沿って配線した信号線と、対角線に沿って配線しない信号線との間の信号遅延が不同一になり、信号を伝送する品質に影響を与える可能性がある。 Referring to FIG. 3, it is an enlarged view of part III of FIG. A square area 15 (in the dotted line shown in FIG. 3) is formed by the center line of two adjacent fiber lines 11 arranged in a row on the insulating cloth 10 and the center line of two adjacent fiber lines 12 arranged in a vertical line. An enclosed area) is formed. A distance L1 between the center lines of two adjacent fiber lines 11 arranged in a row in the insulating cloth 10 is 45.36 × 10 −3 centimeters. That is, 17.86 × 10 −3 inches. The distance W1 between the center lines of two fiber lines 12 that are arranged in tandem in the insulating cloth 10 and adjacent to each other is 45.36 × 10 −3 centimeters. That is, 17.86 × 10 −3 inches. Then, the angle φ 1 formed by the center line of the fiber line 11 arranged in a row and the diagonal line of the square area 15 is arc tanL1 / W1 = 45 °, and the center line of the fiber line 12 arranged in a column and the diagonal line of the square area 15 The angle θ 1 formed by is 90 ° −φ 1 = 45 °. If the signal line is routed along the diagonal line of the rectangular area 15, the dielectric constant is minimized because much resin has passed through the signal line. Therefore, the signal delay between the signal line wired along the diagonal of the rectangular area 15 and the signal line not wired along the diagonal becomes non-identical, which may affect the quality of signal transmission. .

本発明の目的は、前述の問題を解決し、安定な抵抗を持つ信号線を有する印刷回路基板を提供することである。   An object of the present invention is to solve the above-described problems and provide a printed circuit board having a signal line having a stable resistance.

本発明の印刷回路基板が絶縁層を含み、該絶縁層の表面に少なくとも、互いに平行な信号線が配線され、前記絶縁層の中には、絶縁布が配置され、該絶縁布は、互いに平行な第一繊維線と、該第一繊維線に垂直な第二繊維線からなり、前記絶縁布には、隣接する第一繊維線の中心線と、隣接する第二繊維線の中心線とによって方形区域が形成され、該方形区域の対角線と前記第一繊維線の中心線が成す角度が第一角度であり、該方形区域の対角線と前記第二繊維線の中心線が成す角度が第二角度である印刷回路基板において、前記絶縁布への前記信号線の正投影と第一繊維線の中心線が成す角度が零より大きく、且つ第一角度より小さく、又は、前記絶縁布への前記信号線の正投影と第二繊維線の中心線との成す角度が零より大きく、且つ第二角度より小さい。   The printed circuit board of the present invention includes an insulating layer, and at least signal lines parallel to each other are wired on the surface of the insulating layer, an insulating cloth is disposed in the insulating layer, and the insulating cloths are parallel to each other. A first fiber line and a second fiber line perpendicular to the first fiber line, and the insulating fabric includes a center line of the adjacent first fiber line and a center line of the adjacent second fiber line. A square area is formed, an angle formed by the diagonal line of the square area and the center line of the first fiber line is a first angle, and an angle formed by the diagonal line of the square area and the center line of the second fiber line is a second angle. In the printed circuit board having an angle, the angle formed by the orthographic projection of the signal line on the insulating cloth and the center line of the first fiber line is larger than zero and smaller than the first angle, or the above-mentioned to the insulating cloth The angle formed between the orthographic projection of the signal line and the center line of the second fiber line is greater than zero and Angle smaller.

本発明の印刷回路基板の設計方法は、互いに平行な第一繊維線と、該第一繊維線に垂直な第二繊維線からなり、隣接する２つの第一繊維線の中心線と隣接する２つの第二繊維線の中心線との間に方形区域が形成される絶縁布が中間層に設置されている絶縁層を提供するステップと、前記絶縁布への正投影と前記第一繊維線の中心線が成す角度、絶縁布への正投影と前記第二繊維線の中心線が成す角度、絶縁布への正投影と前記方形区域の対角線が成す角度が全て零度ではなく、且つ少なくとも、互いに平行な信号線を前記絶縁層の表面に設置するステップと、を含む。   The printed circuit board design method of the present invention comprises a first fiber line parallel to each other and a second fiber line perpendicular to the first fiber line, and 2 adjacent to the center line of two adjacent first fiber lines. Providing an insulating layer in which an insulating fabric having a square area formed between the center lines of the two second fiber wires is disposed in the intermediate layer; an orthographic projection onto the insulating fabric; and the first fiber wire The angle formed by the center line, the angle formed by the orthographic projection on the insulating cloth and the center line of the second fiber line, and the angle formed by the orthographic projection on the insulating cloth and the diagonal line of the rectangular area are not all zero, and at least Placing parallel signal lines on the surface of the insulating layer.

従来技術と比べて、本発明の前記絶縁布への前記印刷回路基板の信号線の正投影は、前記第一繊維線、第二繊維線または方形区域の対角線に平行していない。前記信号線の一部分が第一繊維線及び第二繊維線を通り、他の部分が前記方形区域を通るから、該信号線の抵抗が大きく変化することを防止でき、信号伝送の品質を高めることができる。   Compared to the prior art, the orthographic projection of the signal line of the printed circuit board onto the insulating fabric of the present invention is not parallel to the diagonal of the first fiber line, the second fiber line or the square area. Since a part of the signal line passes through the first fiber line and the second fiber line and the other part passes through the rectangular area, the resistance of the signal line can be prevented from changing greatly, and the signal transmission quality is improved. Can do.

次に、本発明の印刷回路基板を詳しく説明する。   Next, the printed circuit board of the present invention will be described in detail.

図４と図５を参照すると、印刷回路基板の絶縁層２の表面に信号線２７が配線される。該絶縁層２の中には、絶縁布２０が配置される。該絶縁布２０は、互いに平行な第一繊維線２１と、該第一繊維線２１に垂直な第二繊維線２２からなる。前記絶縁布２０で、隣接する２つの第一繊維線２１の中心線の間の距離Ｌ２が４５．３６×１０−３センチメートルである。即ち、１７．８６×１０−３インチである。隣接する２つの第二繊維線２２の中心線の距離Ｗ２が４５．３６×１０−３センチメートルである。即ち、１７．８６×１０−３インチである。前記絶縁布２０で、隣接する２つの第一繊維線２１の中心線と、隣接する２つの第二繊維線２２の中心線によって、方形区域２５（図５に示した点線に囲まれた区域）が形成される。従って、第一繊維線２１の中心線と方形区域２５の対角線が成す角度φ２がａｒｃ ｔａｎＬ２／Ｗ２＝４５°であり、第二繊維線２２の中心線と方形区域２５の対角線が成す角度θ２が９０°−φ２＝４５°である。上述した２つの角度で、小さい角度の二分の一が２２．５°であり、前記絶縁布２０が前記信号線２７に対して反時計回りに２２．５°回転移動して、図４に示した印刷回路基板が形成される。 4 and 5, a signal line 27 is wired on the surface of the insulating layer 2 of the printed circuit board. An insulating cloth 20 is disposed in the insulating layer 2. The insulating fabric 20 includes a first fiber line 21 parallel to each other and a second fiber line 22 perpendicular to the first fiber line 21. In the insulating fabric 20, the distance L2 between the center lines of the two adjacent first fiber lines 21 is 45.36 × 10 −3 centimeters. That is, 17.86 × 10 −3 inches. The distance W2 between the center lines of the two adjacent second fiber lines 22 is 45.36 × 10 −3 centimeters. That is, 17.86 × 10 −3 inches. In the insulating fabric 20, a square area 25 (area surrounded by a dotted line shown in FIG. 5) by a center line of two adjacent first fiber lines 21 and a center line of two adjacent second fiber lines 22. Is formed. Therefore, the angle φ 2 formed by the center line of the first fiber line 21 and the diagonal line of the rectangular area 25 is arc tanL2 / W2 = 45 °, and the angle θ formed by the center line of the second fiber line 22 and the diagonal line of the rectangular area 25 2 is 90 ° −φ 2 = 45 °. Of the two angles described above, one half of the small angle is 22.5 °, and the insulating fabric 20 is rotated 22.5 ° counterclockwise with respect to the signal line 27, as shown in FIG. A printed circuit board is formed.

前記絶縁布２０への前記信号線２７の正投影が別々に第一繊維線２１、第二繊維線２２及び方形区域２５の対角線との成す角度は、２２．５°より小さくない。即ち、前記絶縁布２０への前記信号線２７の正投影は、第一繊維線２１、第二繊維線２２または方形区域２５の対角線に平行していない。前記信号線２７の一部分が第一繊維線２１及び第二繊維線２２を通り、他の部分が方形区域２５を通るから、該信号線２７の抵抗が大きく変化することを防止し、信号伝送の品質を高めることができる。   The angle formed by the orthographic projection of the signal line 27 on the insulating cloth 20 and the diagonal lines of the first fiber line 21, the second fiber line 22 and the rectangular area 25 is not smaller than 22.5 °. That is, the orthographic projection of the signal line 27 onto the insulating cloth 20 is not parallel to the diagonal lines of the first fiber line 21, the second fiber line 22, or the square area 25. Since a part of the signal line 27 passes through the first fiber line 21 and the second fiber line 22 and the other part passes through the rectangular area 25, the resistance of the signal line 27 is prevented from changing greatly, and the signal transmission is prevented. Quality can be improved.

本発明が上述した実施形態に制限されるものではなく、前記絶縁布２０が前記信号線２７に対して時計回りに２２．５°回転移動してもよい。或いは、前記信号線２７が前記絶縁布２０に対して時計回りまたは反時計回りに２２．５°回転移動してもよい。回転角度が２２．５°に制限されるものではなく、前記絶縁布２０への前記信号線２７の正投影が第一繊維線２１、第二繊維線２２または方形区域２５の対角線と平行しない角度に選択してもよい。   The present invention is not limited to the above-described embodiment, and the insulating cloth 20 may be rotated 22.5 ° clockwise with respect to the signal line 27. Alternatively, the signal line 27 may move 22.5 ° clockwise or counterclockwise with respect to the insulating cloth 20. The rotation angle is not limited to 22.5 °, and an angle at which the orthographic projection of the signal line 27 onto the insulating cloth 20 is not parallel to the diagonal line of the first fiber line 21, the second fiber line 22, or the rectangular area 25. You may choose.

図６と図７を参照すると、印刷回路基板の絶縁層３の表面に信号線３７が配線される。該絶縁層３の中には、絶縁布３０が配置される。該絶縁布３０は、互いに平行な第一繊維線３１と、該第一繊維線３１に垂直な第二繊維線３２からなる。前記絶縁布３０にで、隣接する２つの第一繊維線３１の中心線の間の距離Ｌ３が５４．０５×１０−３センチメートルである。即ち、２１．２８×１０−３インチである。前記絶縁布３０で、隣接する２つの第二繊維線３２の中心線の距離Ｗ３が４２．３４×１０−３センチメートルである。即ち、１６．６７×１０−３インチである。前記絶縁布３０で、隣接する２つの第一繊維線３１の中心線と、隣接する２つの第二繊維線３２の中心線によって、方形区域３５（図７に示した点線に囲まれた区域）が形成される。すると、第一繊維線３１の中心線と方形区域３５の対角線が成す角度φ３がａｒｃ ｔａｎＬ３／Ｗ３＝５２°である。第二繊維線３２の中心線と方形区域３５の対角線が成す角度θ３が９０°−φ３＝３８°である。上述した２つの角度で小さい角度の二分の一が１９°であり、前記絶縁布３０が前記信号線３７に反時計回りに１９°回転移動して、図６に示した印刷回路基板が形成される。 6 and 7, a signal line 37 is wired on the surface of the insulating layer 3 of the printed circuit board. An insulating cloth 30 is disposed in the insulating layer 3. The insulating cloth 30 includes a first fiber line 31 parallel to each other and a second fiber line 32 perpendicular to the first fiber line 31. In the insulating cloth 30, the distance L3 between the center lines of the two adjacent first fiber lines 31 is 54.05 × 10 −3 centimeters. That is, 21.28 × 10 −3 inches. In the insulating cloth 30, the distance W3 between the center lines of two adjacent second fiber lines 32 is 42.34 × 10 −3 centimeters. That is, 16.67 × 10 −3 inches. In the insulating cloth 30, a rectangular area 35 (area surrounded by a dotted line shown in FIG. 7) is formed by the center line of two adjacent first fiber lines 31 and the center line of two adjacent second fiber lines 32. Is formed. Then, the angle phi 3 diagonals forms the center line and the rectangular region 35 of the first fiber line 31 is arc tanL3 / W3 = 52 °. The angle θ 3 formed by the center line of the second fiber line 32 and the diagonal line of the rectangular area 35 is 90 ° −φ 3 = 38 °. One half of the two angles mentioned above is 19 °, and the insulating cloth 30 is rotated 19 ° counterclockwise to the signal line 37 to form the printed circuit board shown in FIG. The

前記絶縁布３０への前記信号線３７の正投影と、別々に第一繊維線３１、第二繊維線３２及び方形区域３５の対角線が成す角度が１９°より小さくない。即ち、前記絶縁布３０への前記信号線３７の正投影は、別々に第一繊維線３１、第二繊維線３２または方形区域３５の対角線に平行していない。前記信号線３７の一部分が第一繊維線３１及び第二繊維線３２を通り、他の部分が方形区域３５を通るから、該信号線３７の抵抗が大きく変化することを防止でき、信号伝送の品質を高めることができる。   The angle formed by the orthographic projection of the signal line 37 on the insulating cloth 30 and the diagonal lines of the first fiber line 31, the second fiber line 32, and the rectangular area 35 separately is not smaller than 19 °. That is, the orthographic projection of the signal line 37 on the insulating cloth 30 is not separately parallel to the diagonal lines of the first fiber line 31, the second fiber line 32, or the square area 35. Since a part of the signal line 37 passes through the first fiber line 31 and the second fiber line 32 and the other part passes through the square area 35, it is possible to prevent the resistance of the signal line 37 from changing greatly, Quality can be improved.

本発明が上述した実施形態に制限されるものではなく、前記絶縁布３０が前記信号線３７に対して時計回りに１９°回転移動してもよい。或いは、前記信号線３７が前記絶縁布３０に対して時計回りまたは反時計回りに１９°回転移動してもよい。回転角度が１９°に制限されるものではなく、該絶縁布３０への信号線３７の正投影が第一繊維線３１、第二繊維線３２または方形区域３５の対角線に平行しない角度に選択してもよい。   The present invention is not limited to the above-described embodiment, and the insulating cloth 30 may be rotated 19 ° clockwise with respect to the signal line 37. Alternatively, the signal line 37 may rotate 19 ° clockwise or counterclockwise with respect to the insulating cloth 30. The rotation angle is not limited to 19 °, and the orthographic projection of the signal line 37 on the insulating cloth 30 is selected so that the first fiber line 31, the second fiber line 32, or the rectangular area 35 is not parallel to the diagonal line. May be.

図８と図９を参照すると、印刷回路基板の絶縁層４に互いに平行な信号線４７が配線される。該絶縁層４の中には、絶縁布４０が配置される。該絶縁布４０は、互いに平行な第一繊維線４１と、該第一繊維線４１に垂直な第二繊維線４２からなる。前記絶縁布４０で、隣接する第一繊維線４１の中心線の間の距離Ｌ４が図７に示した距離Ｌ３と等しく、隣接する２つの第二繊維線４２の中心線の間の距離Ｗ４が図７の示した距離Ｗ３と等しい。前記絶縁布４０で、隣接する２つの第一繊維線４１の中心線と、隣接する２つの第二繊維線４２の中心線によって、方形区域４５（図９に示した点線に囲まれた区域）が形成される。すると、第一繊維線４１の中心線と方形区域４５の対角線が成す角度φ４がａｒｃ ｔａｎＬ４／Ｗ４＝５２°であり、第二繊維線４２の中心線と方形区域４５の対角線が成す角度θ４が９０°−φ４＝３８°である。上述した２つの角度で小さい角度の二分の一が１９°であり、前記信号線４７が前記絶縁布４０に対して反時計回りに１９°回転移動して、図８に示した印刷回路基板が形成される。 Referring to FIGS. 8 and 9, signal lines 47 parallel to each other are wired on the insulating layer 4 of the printed circuit board. An insulating cloth 40 is disposed in the insulating layer 4. The insulating cloth 40 includes a first fiber line 41 parallel to each other and a second fiber line 42 perpendicular to the first fiber line 41. In the insulating cloth 40, the distance L4 between the center lines of the adjacent first fiber lines 41 is equal to the distance L3 shown in FIG. 7, and the distance W4 between the center lines of the two adjacent second fiber lines 42 is It is equal to the distance W3 shown in FIG. In the insulating cloth 40, a square area 45 (area surrounded by a dotted line shown in FIG. 9) by a center line of two adjacent first fiber lines 41 and a center line of two adjacent second fiber lines 42. Is formed. Then, the angle φ 4 formed by the center line of the first fiber line 41 and the diagonal line of the square area 45 is arc tan L4 / W4 = 52 °, and the angle θ formed by the center line of the second fiber line 42 and the diagonal line of the square area 45 is formed. 4 is 90 ° −φ 4 = 38 °. One half of the small angle between the two angles described above is 19 °, and the signal line 47 is rotated 19 ° counterclockwise with respect to the insulating cloth 40, so that the printed circuit board shown in FIG. It is formed.

前記絶縁布４０への前記信号線４７の正投影が別々に第一繊維線４１、第二繊維線４２及び方形区域４５の対角線との成す角度は、１９°より小さくない。即ち、前記絶縁布４０への前記信号線４７の正投影は、第一繊維線４１、第二繊維線４２または方形区域４５の対角線に平行していない。前記信号線４７の一部分が第一繊維線４１及び第二繊維線４２を通り、他の部分が方形区域４５を通るため、該信号線４７の抵抗が大きく変化することを防止でき、信号伝送の品質を高めることができる。   The angle formed by the orthographic projection of the signal line 47 on the insulating cloth 40 and the diagonal lines of the first fiber line 41, the second fiber line 42, and the square area 45 is not smaller than 19 °. That is, the orthographic projection of the signal line 47 on the insulating cloth 40 is not parallel to the diagonal lines of the first fiber line 41, the second fiber line 42, or the square area 45. Since a part of the signal line 47 passes through the first fiber line 41 and the second fiber line 42 and the other part passes through the square area 45, it is possible to prevent the resistance of the signal line 47 from greatly changing, Quality can be improved.

本発明が上述した実施形態に制限されるものではなく、前記信号線４７が前記絶縁布４０に対して時計回りに１９°回転移動してもよい。或いは、前記絶縁布４０が前記信号線４７に対して時計回りまたは反時計回りに１９°回転移動してもよい。回転角度は、１９°に制限されるものではなく、前記絶縁布４０への前記信号線４７の正投影が第一繊維線４１、第二繊維線４２または方形区域４５の対角線に平行しないような角度を選択してもよい。   The present invention is not limited to the above-described embodiment, and the signal line 47 may rotate 19 ° clockwise with respect to the insulating cloth 40. Alternatively, the insulating cloth 40 may be rotated 19 ° clockwise or counterclockwise with respect to the signal line 47. The rotation angle is not limited to 19 °, and the orthographic projection of the signal line 47 onto the insulating cloth 40 is not parallel to the diagonal line of the first fiber line 41, the second fiber line 42, or the square area 45. An angle may be selected.

印刷回路基板の絶縁布への複数の信号線の正投影と、繊維線とが重なれば、該信号線の信号遅延が１５２．８×１０−１２秒/インチであり、該信号線の正投影と、繊維線とが重ならなければ、該信号線の信号遅延が１４８．６×１０−１２秒/インチであり、前者と後者との信号遅延の差が４．２×１０−１２秒/インチである。また、印刷回路基板に水平方向に沿って、互いに平行な２つの信号線が配線され、各々の信号線の長さが２インチである。絶縁布への１つの信号線の投影と繊維線とが重なり、絶縁布への他の１つの信号線の投影と繊維線とが重ならなければ、２つの信号線の信号遅延時間の差が８．４×１０−１２秒/インチである。本発明の実施形態において、該平行な２つの信号線は、信号遅延時間の差がおおよそ零である。 If the orthographic projection of the plurality of signal lines on the insulating cloth of the printed circuit board and the fiber line overlap, the signal delay of the signal line is 152.8 × 10 −12 seconds / inch, If the projection and the fiber line do not overlap, the signal delay of the signal line is 148.6 × 10 −12 seconds / inch, and the difference in signal delay between the former and the latter is 4.2 × 10 −12 seconds. / Inch. Further, two signal lines parallel to each other are wired along the horizontal direction on the printed circuit board, and the length of each signal line is 2 inches. If the projection of one signal line on the insulating cloth and the fiber line overlap, and the projection of the other signal line on the insulating cloth and the fiber line do not overlap, the difference in signal delay time between the two signal lines is 8.4 × 10 −12 seconds / inch. In the embodiment of the present invention, the difference between the signal delay times of the two parallel signal lines is approximately zero.

従来技術の印刷回路基板の絶縁布と信号線を示す図である。It is a figure which shows the insulation cloth and signal wire | line of a printed circuit board of a prior art. 図１のII-II線に沿う断面図である。It is sectional drawing which follows the II-II line of FIG. 図１の部分IIIの拡大図である。It is an enlarged view of the part III of FIG. 本発明の第一実施形態の印刷回路基板の絶縁布と信号線を示す図である。It is a figure which shows the insulation cloth and signal wire | line of the printed circuit board of 1st embodiment of this invention. 図４の部分Ｖの拡大図である。It is an enlarged view of the part V of FIG. 本発明の第二実施形態の印刷回路基板の絶縁布と信号線を示す図である。It is a figure which shows the insulation cloth and signal wire | line of the printed circuit board of 2nd embodiment of this invention. 図６の部分VIIの拡大図である。It is an enlarged view of the part VII of FIG. 本発明の第三実施形態の印刷回路基板の絶縁布と信号線を示す図である。It is a figure which shows the insulation cloth and signal wire | line of the printed circuit board of 3rd embodiment of this invention. 図８の部分IXの拡大図である。It is an enlarged view of the part IX of FIG.

符号の説明Explanation of symbols

１、２、３、４ 絶縁層
１０、２０、３０、４０ 絶縁布
１１ 横列に並ぶ繊維線
１２ 縦列に並ぶ繊維線
１３ 隙間
１５ 方形区域
１７、２７、３７、４７ 信号線
２１、３１、４１ 第一繊維線
２２、３２、４２ 第二繊維線 1, 2, 3, 4 Insulating layer 10, 20, 30, 40 Insulating cloth 11 Fiber line 12 arranged in a row 12 Fiber line 13 arranged in a row 13 Gap 15 Square section 17, 27, 37, 47 Signal line 21, 31, 41 First One fiber wire 22, 32, 42 Second fiber wire

Claims (8)

印刷回路基板が絶縁層を含み、該絶縁層の表面に少なくとも、互いに平行な信号線が配線され、前記絶縁層の中には、絶縁布が配置され、該絶縁布は、互いに平行な第一繊維線と、該第一繊維線に垂直な第二繊維線からなり、前記絶縁布には、隣接する２つの第一繊維線の中心線と、隣接する２つの第二繊維線の中心線とによって方形区域が形成され、該方形区域の対角線と前記第一繊維線の中心線とが成す角度が第一角度であり、該方形区域の対角線と前記第二繊維線の中心線とが成す角度が第二角度である印刷回路基板において、
前記絶縁布への前記信号線の正投影と第一繊維線の中心線が成す角度が零より大きく、且つ第一角度より小さく、又は、前記絶縁布への前記信号線の正投影と第二繊維線の中心線が成す角度が零より大きく、且つ第二角度より小さいことを特徴とする印刷回路基板。 The printed circuit board includes an insulating layer, and at least signal lines parallel to each other are wired on the surface of the insulating layer, an insulating cloth is disposed in the insulating layer, and the insulating cloth is first parallel to each other. A fiber line and a second fiber line perpendicular to the first fiber line, and the insulating fabric includes a center line of two adjacent first fiber lines and a center line of two adjacent second fiber lines A square area is formed, and the angle formed by the diagonal line of the square area and the center line of the first fiber line is the first angle, and the angle formed by the diagonal line of the square area and the center line of the second fiber line In the printed circuit board where is the second angle,
The angle formed by the orthographic projection of the signal line on the insulating cloth and the center line of the first fiber line is larger than zero and smaller than the first angle, or the orthographic projection of the signal line on the insulating cloth and the second A printed circuit board characterized in that the angle formed by the center line of the fiber wire is larger than zero and smaller than the second angle. 前記絶縁布への前記信号線の正投影が前記第一繊維線と成す角度及び前記第二繊維線と成す角度は、前記第一角度と前記第二角度のうちの小さい角度の二分の一よりも小さくないことを特徴とする請求項１記載の印刷回路基板。   The angle formed by the orthographic projection of the signal line on the insulating cloth with the first fiber line and the angle formed with the second fiber line is less than one half of the smaller one of the first angle and the second angle. The printed circuit board according to claim 1, wherein the printed circuit board is not small. 前記絶縁布への前記信号線の正投影が前記方形区域の対角線と成す角度は、前記第一角度と第二角度のうちの小さい角度の二分の一よりも小さくないことを特徴とする請求項２記載の印刷回路基板。   The angle formed by the orthographic projection of the signal line on the insulating cloth with the diagonal line of the square area is not smaller than one half of the smaller one of the first angle and the second angle. The printed circuit board according to 2. 前記絶縁布は、ガラス繊維布であることを特徴とする請求項１記載の印刷回路基板。   The printed circuit board according to claim 1, wherein the insulating cloth is a glass fiber cloth. 印刷回路基板の設計方法であって、
互いに平行な第一繊維線と、該第一繊維線に垂直な第二繊維線からなり、隣接する２つの第一繊維線の中心線と隣接する２つの第二繊維線の中心線との間に方形区域が形成される絶縁布が中間層に設置されている絶縁層を提供するステップと、
前記絶縁布への正投影と前記第一繊維線の中心線が成す角度、絶縁布への正投影と前記第二繊維線の中心線が成す角度、及び絶縁布への正投影と前記方形区域の対角線が成す角度が皆零度ではなく、且つ少なくとも、互いに平行な信号線を前記絶縁層の表面に設置するステップと、
を含む、印刷回路基板の設計方法。 A printed circuit board design method comprising:
A first fiber line parallel to each other and a second fiber line perpendicular to the first fiber line, between the center line of two adjacent first fiber lines and the center line of two adjacent second fiber lines Providing an insulating layer in which an insulating fabric in which a square area is formed is installed in the intermediate layer;
The angle formed by the orthographic projection on the insulating cloth and the center line of the first fiber line, the angle formed by the orthographic projection on the insulating cloth and the center line of the second fiber line, and the orthographic projection on the insulating cloth and the square area The angle formed by the diagonal lines is not all zero, and at least the parallel signal lines are installed on the surface of the insulating layer; and
A method for designing a printed circuit board, comprising: 前記方形区域の対角線と前記第一繊維線の中心線とが成す角度が第一角度であり、前記方形区域の対角線と前記第二繊維線の中心線とが成す角度が第二角度であり、前記絶縁布への前記信号線の正投影が前記第一繊維線と成す角度及び前記第二繊維線と成す角度は、前記第一角度と前記第二角度のうちの小さい角度の二分の一よりも小さくないことを特徴とする請求項５記載の印刷回路基板の設計方法。   The angle formed by the diagonal line of the square area and the center line of the first fiber line is a first angle, and the angle formed by the diagonal line of the square area and the center line of the second fiber line is a second angle; The angle formed by the orthographic projection of the signal line on the insulating cloth with the first fiber line and the angle formed with the second fiber line is less than one half of the smaller one of the first angle and the second angle. 6. The printed circuit board design method according to claim 5, wherein the printed circuit board is not small. 前記絶縁布への前記信号線の正投影が前記方形区域の対角線と成す角度は、前記第一角度と前記第二角度のうちの小さい角度の二分の一よりも小さくないことを特徴とする請求項６記載の印刷回路基板の設計方法。   The angle formed by the orthographic projection of the signal line on the insulating cloth with the diagonal line of the square area is not smaller than one half of the smaller one of the first angle and the second angle. Item 7. A printed circuit board design method according to Item 6. 前記絶縁布は、ガラス繊維布であることを特徴とする請求項５記載の印刷回路基板の設計方法。   6. The printed circuit board design method according to claim 5, wherein the insulating cloth is a glass fiber cloth.
JP2008011805A 2007-02-07 2008-01-22 Printed circuit board and method of designing printed circuit board Pending JP2008193073A (en)

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